Release-valve device



ocr. 4, 1927. 1,644,571

C. C. FARMER RELEASE VALVE DEVICE Filed Dec. 21.1926

INVENTOR cLY'DEdl-AMER i I' BY ATTORN EY 'parentela oa. 4, i927.

- .aire

oLi'nn c. reni/inn, or rirfrsnunen," rnivii-s-YLVANIA, Assreiioa-froT.rin:v'f'vviisfi'Iii-einen-sn .ein Bier-irre coi/remix; onWiinivinapinc-i,y reivivsvnvaivrii, yA consonancia OF PENNSYLVANA.

appiicaaoa ined December 21,: 1926Q seriai'n. 156,1"3'5, l i

This invention y relates .to vfluid pressure brakesfand in particulartol an auxiliary resf ervoir release valve device. i I y, l 1n the usualstandard fluid pressure brake equipment a manually operated releasevalve device is einployed to vent fluid underp'res sure ioin theauxiliary reservoir to the at inosphere, said release valve devicelhaving only one open position, so thattheiow of iluid under pressurerornthe auxiliary resfervo-ir to the atmospl'iere is -alvvays at thesame rate. i l j Before a car is cut off switching, the fluidunderpres'sure in the Vbralre pipel isv veiitedgtoV the atmosphere,thereby causing an application of the brakes onV that car, and torelease said application fof the brakes so as to' be able to' inove saidcar the fluid vpressure is vented fron) the auxiliary' reservoir, sothat a release of fluid from the brake cylinder may take place'. Undersuch conditions the venting .ofthe rvfluid from 'the auxiliary reservoirto tliejae inesphere should be rapid to facilitate 'quick trainhandling. 1 l 1 VThere are circumstances, however, under which theopeningotalarge passage roin the auxiliary reservoir tothe atmosphere is.unnecessary and undesirableyas ier example Yin releasing brakes whichhave becoine stuck d ue to the pressure ofthe fiuid in the auxiliaryreservoir being higherthanv the brake pipe pressure, asoccasionallyfoccurs on the head end oi a train, when the release position of thebrake valve device is einployed to' partially 'charge the brake ypipeand auxiliary reservoirs.. in using release position 'of the brake valvedevice @to charge the brake pipe, fluid at inain reservoir pressureflows directly to the brake pipe and raises said brake pipe pressure vtoa degree j higher `than the setting of theA feed valve device. Ifthebrak'evalve devicev reinains in release positionlong enough, the

auxiliary reservoirs on the front portion of the train also becomecharged to a pressure higher than thev setting ofthefeed valve'device,'so that when the brake valvedevice is nioved from releasey torunning position,

valve devicesto service position and applies i RELEASE-verve inruilen,v.Y

frein altrain, as in the brakes. To release such-.fan application ot the'brakes theiqzuixiliarylv reservoir. pres' sure is reduced 'tlirougli'arelease valve 3de-1 vice to degieelowery tli'anthe brake pipe 'Ipressure,'so"that the'liigherbrake pipe pres l. 60.,

sure will shift the ytriple valve device to re'-` lease position. `Withlthel standard vrelease valve device yhavingfonly"oneV openpositioii,

anl unnecessary"ainountfof `luid froin the auxiliary reservoir may n bevented Ato'the atmosphere., vThe principal Vebjeotfof in entio'n Vis tfoprovide Van improved release :valve device havingftvvo open positions,oneV 'positionproviding a" large venting' passageand fthe other l Iposition providiiigav sniall'jventing passage;

In the`accoiiipanyii'ig drawing', Fig.; 1 is sectional view'otra-release ,valve devicey 'ap` plied to an auxiliary'rese'rvoirfaiidV'showing iny inventioirapplied thereto; iand'fFigffQ' V'a section fonthe line 2'-QfOFig.'1.., f According to -theldrayvingQ the@` releasevalve' device lfniay "comprise aA casing hav;

ing a threaded plug adapted to lbe screwed"y into the auxiliaryreservoir 2 'and'havin a chamber 4 containing af valve 5, adaptedv tonorinallyseal against aws'eat'rii'ig 6 due to' tli'epressui'e ofthespring-7j'. IntegralWi-tl'i said 'valve isa hollow cylindrical" valveguide l 8 adapted to operate in, chamber 9 andhav'- ing portsy isteiiillis secu'red'to ysaidv valveand extends through' the casing and isadapted to be engaged by the face' '12oan operatiii1, -y lever 13 asfsaid'lever isturne'd about 'either the -ulcruni pin-14ert the fful- Abrac'liet 16 :secured to vthe auxiliary resi ervoir 2 is -provide'divitha Achainber '17 containing ,a slidable ,and rotatable'ineinber 18theretobya lpin 21, the 'endsfof the pins g .protruding through the'O'ivpositelsideSO-i the ineinber.18.,: n i..

thus limit the outvvard travel o fxtheineinber 18. With the bent handleend ofthe rod 20 .turned .ft'ofl horizontal position; :or `90 O, fromthe Y positionshoWn iri;1 `.ig.,s1-,iI the' Api'iii-g21fis l l ,fioorWiththe eperating rodg20v in tlieposition Vshown in iFig. .1,tliegpin'i21 isf adapted to Y lengage. the face 22y oi/the bracket167and adapted to enterthe slotsl 23 in the 'cylinl' ail "ofi` `andthereby fiLfffrfei-outward travel l"off themenii @ber-183er? *"ulledfto`the ri ht` until the pin mistakes fue; 22er the;

.Y l0: ondin i amount,` an'dfsaidi lever turning @la :t

imitd `e`1itelf1t,fthreby xunseating said romtheauiiliary Vreservoirpplled- `to chamber 4ffthro'ughfpasf .f sage; 24 offthe;"release` Yvalvedevice, then does not engage theiface 22 of 4fefrxnfovemeni t..ofvsaidoperatinge; rod 20 tothe right, f. thus *Causing cerrespondln-glyj1nhev'mbination L Withfa release valve, of a i 'irnemben for operatingsaidV valve; meansffor .lmitgng'ahe openinggmovement of-sadvalv'eceibipnation with a valve member hav'- Y ein xd I peratinglmeansrfand'thereby said 'portkisfepenemifaidemeans `.Opm-11tion, tosflovvlyventth'e{lindern- 1 6. aempmjmm'the.anxiha-eseivoir .to f d t. b

l mf l. rat-2n g ro f an Lmemf o sai o era incr mem er. at here" theope' 4.1naplluid pressure release valve device,fV thecombination With avalve memberv hav- 'ing a po1j't,'of a rotatable operating'member, 1"movable longitudinally to operate said valve j v.member to open saidport, a stop for limitr'aeka.. The

fulcrum 1 4 .causesfthefffaee 1 iveM engagea@ valve ma 11 i news .1 est"the'l'openxvalve gfthrough Vthe` i 'opened pdas-1 0 in `the.; hollowCif- V the 'combination Vvvitha valvemember hav-Y beleben 41 :and theauxiliary reservoir 2,. A te.. hamberq. 9 land ithene" 'to atmosphere rv y 1j a uidpressure Teleasezvalvedevice, f y

' moved away byliperaton off said member-"to f limit.v therateoffrelease of fluid, andf'means for per:

" bn to providecanfinrased opening "lm ov'e- .antanfingparams@nase@Salve4 device',

' sa 2:15015@ fof Imeans ffor operating Y'said' 'for'limitingith'einiow/efv n vlinuitingv.means ineffective'.y nngaiseidrilimitingimtans "inel'fec-- f l In testimony `whereofIhavehereunto set pressure-@release `alivefdeviee, y

wthria -Avalve a member hav- Vinge port, of anoperating' memberoperatively 'Connected to said valve'member, *.a-

stop for limiting 'the movement of said'poeratin-g member, Lsaid stopbeing renderedfff Y ineffective upon a predetermined kmovement ing thelongitudinal movement oi'said operating'member and' thereby the extentysaid t portis opened,` said stop beingrendered ineffective to limit'thelongitudinal `movement of said V operating'memberupon a predeter-`mined rotative movement of `said operating member,

Ina fluidpressure lrelease valve device,V

ing a portrof acasing, la member mounted kmove'mi-intof said operatingmember,V said casing hvavingfslots for receiving said pinfjupon arotative movement of .said operating member, so as topermit a furtherlongitudinalfmovementjof said operating member.

6. An auxiliary reservoir release valve device comprising a casing7 arelease valve y mounted' inv saidjcasing, fa' sleeve movable with saidvalve and having a port, adapted.

to'be opened'vvhensaidV valve is unseated, andmeans for operating saidvalve. j

ine

" 7, An auxiliary reservoirrelease valve de.

vice comprising va casingv having a; valvek chambe'r, a release valvemounted-in said chamber and adapted for engagement' With an A annularseat,V afsleeve carried by 'said valvefand having al release portthrough which fluid is Vreleased when said valve is from its seat, vandmeans for operating said valve. f

An auxiliary reservoir release valve.

device comprising a casing havinga valve chamber,v a release `valvemounted. in said chamber andA adapted for Iengagement. With `anfannularseat,` a sleevejcarried by said valve and having .arelease portv throughVWhich `fluid vis released VWhen said valve .is

moved away from its seat,`..an operating fmember forfsaid valve, meanskfor normally :limiting the movement oli' said operating memberandfthereby the opening` movement of saidfvalve,V andmeans-forJr-endering said my lhand.

